∴∠A=∠C,
∵AE=CF,
∴AE+EF=CF+EF,
即AF=CE,
∵在△ADF和△CBE中
{∠B=∠D
下列各组物质的鉴别方法不正确的是( )
路灯总是一起亮,一起暗,它们的连接方式是____,原因是____
一 Many students don't know _____ stress and become worried.
一 I think they should communicate more with their parents.